smaall fix

CMakeLists.txt

@@ -7,7 +7,7 @@ add_executable(${PROJECT_NAME}
     main.cpp
 )
 
-target_include_directories(${PROJECT_NAME} PRIVATE ${OpenCV_INCLUDE_DIRS} ${CMAKE_CURRENT_SOURCE_DIR}/third_party/eigen)
+target_include_directories(${PROJECT_NAME} SYSTEM PRIVATE ${OpenCV_INCLUDE_DIRS} ${CMAKE_CURRENT_SOURCE_DIR}/third_party/eigen)
 target_link_libraries(${PROJECT_NAME} ${OpenCV_LIBRARIES})
 target_compile_definitions(${PROJECT_NAME} PRIVATE IMG_DIR="${CMAKE_CURRENT_SOURCE_DIR}/img")
 

main.cpp

@@ -32,10 +32,11 @@ int main() {
     cv::Size patternSize(width, height);
 
     std::vector<cv::Point3f> obj;
-    obj.reserve(width * height);
+    obj.reserve(static_cast<std::size_t>(width * height));
     for (int y = 0; y < height; y++) {
         for (int x = 0; x < width; x++) {
-            obj.emplace_back(x * gridSize, y * gridSize, 0.f);
+            obj.emplace_back(static_cast<float>(x) * gridSize, static_cast<float>(y) * gridSize,
+                             0.f);
         }
     }
 
@@ -80,10 +81,10 @@ int main() {
     cv::undistortImagePoints(corners, pts, cameraMatrix, distCoeffs);
 
     std::vector<cv::Point2f> obj2;
-    obj2.reserve(width * height);
+    obj2.reserve(static_cast<std::size_t>(width * height));
     for (int y = 0; y < height; y++) {
         for (int x = 0; x < width; x++) {
-            obj2.emplace_back(x * gridSize, y * gridSize);
+            obj2.emplace_back(static_cast<float>(x) * gridSize, static_cast<float>(y) * gridSize);
         }
     }
     auto hom = cv::findHomography(pts, obj2, cv::RANSAC);
@@ -151,7 +152,7 @@ int main() {
     }
 
     std::vector<cv::Point2f> projected;
-    for (int i = 0; i < 4; i++) {
+    for (std::size_t i = 0; i < 4; i++) {
         auto   &pt = rotated2[ i ];
         cv::Mat point(3, 1, CV_64FC1);
         point.at<double>(0, 0) = pt.x;
@@ -165,7 +166,7 @@ int main() {
 
     std::vector<cv::Vec2f> org;
     std::vector<cv::Vec2f> proj;
-    for (int i = 0; i < 4; i++) {
+    for (std::size_t i = 0; i < 4; i++) {
         auto &o = origins[ i ];
         auto &p = projected[ i ];